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X in (-oo:+oo)
(X^2)/2 = 110 // - 110
(X^2)/2-110 = 0
1/2*X^2 = 110 // : 1/2
X^2 = 220
X^2 = 220 // ^ 1/2
abs(X) = 2*55^(1/2)
X = 2*55^(1/2) or X = -(2*55^(1/2))
X in { 2*55^(1/2), -(2*55^(1/2)) }
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